US7003429B2 - Method for calculating the operating time of hydraulic components - Google Patents
Method for calculating the operating time of hydraulic components Download PDFInfo
- Publication number
- US7003429B2 US7003429B2 US10/498,772 US49877204A US7003429B2 US 7003429 B2 US7003429 B2 US 7003429B2 US 49877204 A US49877204 A US 49877204A US 7003429 B2 US7003429 B2 US 7003429B2
- Authority
- US
- United States
- Prior art keywords
- time
- separate
- windows
- monitoring period
- operating time
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related, expires
Links
Images
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
- F15B19/005—Fault detection or monitoring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/662—Electrical control in fluid-pressure brake systems characterised by specified functions of the control system components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/88—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means
- B60T8/885—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means using electrical circuitry
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
- H03K5/19—Monitoring patterns of pulse trains
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/40—Failsafe aspects of brake control systems
- B60T2270/413—Plausibility monitoring, cross check, redundancy
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0251—Elements specially adapted for electric control units, e.g. valves for converting electrical signals to fluid signals
- F16H2061/0255—Solenoid valve using PWM or duty-cycle control
Definitions
- This invention relates to a method for calculating the operating time of hydraulic, electrohydraulic or electric components of a motor vehicle or of a working machine.
- ED operating time
- the control devices or control software concerned must know the actual operating time (ED) at the moment at which a control signal is generated.
- the control device For determining the actual operating time, it is required that one component be controlled beginning from the present moment up to the moment lying back by the reference period. If the control device generates a control signal, for example, every 5 ms, the operating time in a reference period of 60 seconds, for example, 12000 individual values, has to be taken into account for calculating. Therefore, to exactly determine the operating time, the values have to be separately stored for each component. The storage place, as a rule, is not available in a control device for reasons of cost.
- the problem on which this invention is based is to outline a method for determining the actual operating time of a hydraulic, electrohydraulic or electric component of a motor vehicle or of a working machine, which makes determining the actual operating time as precisely as possible in case of storage place need clearly smaller than the method according to the prior art.
- the monitoring period or the reference period is divided into separate intervals or time windows which correspond to a certain number of program or control runnings; there is coordinated with each time window one value which is increased by the momentary control period.
- the operating time then results as sum of the values of the individual time windows; it is possible to provide one or more windows with weighting factors.
- the inventive method considerably reduces the number of values to be stored; it corresponds to the number of time windows and the stored meter.
- FIG. 1 shows a time/signal diagram with the corresponding time windows for a general case
- FIG. 2 is a time/signal diagram with the inventive time windows for a concrete embodiment explained herebelow.
- the monitoring or reference period is divided into individual time windows, each time window having the length of k control or program runnings.
- the number k can be defined based on the precision of calculation desired to be achieved. The higher k is, the lower the precision obtainable, since several values are combined.
- the operating time of the component concerned during one of said time windows is stored as one value, the value of the actual time window being increased with each program running by the momentary control time of the component.
- the time window just expired moves to the second place, the meter is reset and the value of the time window lying farthest back is deleted whereby the storage place that has become free is available for recording the operating time in the new actual time window.
- the number of time windows does not change all together.
- the operating time within the monitoring period is calculated by summing up all values of the individual time windows.
- One variant of the invention provides weighting of the individual window by means of an appertaining weighting factor.
- the time window lying farthest back loses influence as the level (meter n) of the actual time window increases.
- the time window lying farthest back is weighted with the factor (1 ⁇ n/k), n representing the meter of the actual time window.
- the precision of the calculation of the operating time is mainly determined by the factor k.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Transportation (AREA)
- Nonlinear Science (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- General Physics & Mathematics (AREA)
- Control Of Electric Motors In General (AREA)
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
- Measuring Frequencies, Analyzing Spectra (AREA)
- Measurement Of Unknown Time Intervals (AREA)
- Testing And Monitoring For Control Systems (AREA)
- Feedback Control In General (AREA)
Abstract
Description
- Tu=monitoring period
- Tp=program running time
- k=number of values per time window
- Tu monitoring period
- tp program running time
- k number of values per time window
- n meter
Claims (4)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10161742A DE10161742A1 (en) | 2001-12-15 | 2001-12-15 | Measurement of the switched-on or operating time of hydraulic electro-hydraulic or electrical components that are operated in on- off mode, whereby the actual operating time is determined using an approximation method |
DE10161742.9 | 2001-12-15 | ||
PCT/EP2002/013978 WO2003052931A1 (en) | 2001-12-15 | 2002-12-10 | Method for calculating the operating time of hydraulic components |
Publications (2)
Publication Number | Publication Date |
---|---|
US20050033552A1 US20050033552A1 (en) | 2005-02-10 |
US7003429B2 true US7003429B2 (en) | 2006-02-21 |
Family
ID=7709395
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/498,772 Expired - Fee Related US7003429B2 (en) | 2001-12-15 | 2002-12-10 | Method for calculating the operating time of hydraulic components |
Country Status (7)
Country | Link |
---|---|
US (1) | US7003429B2 (en) |
EP (1) | EP1454413B1 (en) |
JP (1) | JP4219815B2 (en) |
KR (1) | KR100959424B1 (en) |
BR (1) | BR0214970A (en) |
DE (2) | DE10161742A1 (en) |
WO (1) | WO2003052931A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080171633A1 (en) * | 2005-03-17 | 2008-07-17 | Zf Friedrichshafen Ag | Method And Device For Controlling A Motor Vehicle Drive Train |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4476532A (en) | 1978-12-18 | 1984-10-09 | Nippondenso Co., Ltd. | Method and apparatus for controlling the duty cycle of an off-on type valve by monitoring the history of the state of the valve |
DE3227264C2 (en) | 1982-07-21 | 1990-01-18 | Alfred Teves Gmbh, 6000 Frankfurt, De | |
US4947734A (en) | 1987-04-20 | 1990-08-14 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Method of duty-ratio control for hydraulically actuated slip control lock-up clutch and transmission |
US4964050A (en) * | 1987-05-12 | 1990-10-16 | Honda Giken Kogyo Kabushiki Kaisha | Method of controlling electrical devices of internal combustion engines |
DE3943357A1 (en) | 1989-12-29 | 1991-07-04 | Rexroth Mannesmann Gmbh | CIRCUIT ARRANGEMENT WITH A CONTROL ELECTRONICS FOR THE MAGNETIC COILS OF ACTUATORS OF A HYDRAULIC SYSTEM |
US5177965A (en) | 1989-12-29 | 1993-01-12 | Heinrich Nikolaus | Pump control system with limit signal generated at a given displacement setting |
DE4138225A1 (en) | 1991-11-21 | 1993-05-27 | Bosch Gmbh Robert | METHOD FOR REGULATING THE MOVEMENT OF A LIFT |
DE9217999U1 (en) | 1992-04-18 | 1993-06-17 | Man Nutzfahrzeuge Ag, 8000 Muenchen, De | |
DE3812672C2 (en) | 1987-04-20 | 1995-09-28 | Mitsubishi Motors Corp | Hydraulic control method for a hydraulically actuated load |
US6157671A (en) | 1997-11-06 | 2000-12-05 | Caterpillar Inc. | Apparatus and method for digitally monitoring a duty cycle of a pulse width modulated signal |
DE19929431A1 (en) | 1999-06-26 | 2000-12-28 | Mannesmann Sachs Ag | Hydraulic control drive, e.g. for clutches, gearboxes, has arrangement for detecting level of fluid in reservoir container from duration of time for which pump is switched on |
US6856879B2 (en) * | 2003-01-24 | 2005-02-15 | Komatsu Ltd. | Work machine management device |
-
2001
- 2001-12-15 DE DE10161742A patent/DE10161742A1/en not_active Withdrawn
-
2002
- 2002-12-10 US US10/498,772 patent/US7003429B2/en not_active Expired - Fee Related
- 2002-12-10 DE DE50202814T patent/DE50202814D1/en not_active Expired - Lifetime
- 2002-12-10 EP EP02804886A patent/EP1454413B1/en not_active Expired - Fee Related
- 2002-12-10 KR KR1020047009221A patent/KR100959424B1/en not_active IP Right Cessation
- 2002-12-10 WO PCT/EP2002/013978 patent/WO2003052931A1/en active IP Right Grant
- 2002-12-10 JP JP2003553711A patent/JP4219815B2/en not_active Expired - Fee Related
- 2002-12-10 BR BR0214970-2A patent/BR0214970A/en not_active IP Right Cessation
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4476532A (en) | 1978-12-18 | 1984-10-09 | Nippondenso Co., Ltd. | Method and apparatus for controlling the duty cycle of an off-on type valve by monitoring the history of the state of the valve |
DE3227264C2 (en) | 1982-07-21 | 1990-01-18 | Alfred Teves Gmbh, 6000 Frankfurt, De | |
US4947734A (en) | 1987-04-20 | 1990-08-14 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Method of duty-ratio control for hydraulically actuated slip control lock-up clutch and transmission |
DE3812672C2 (en) | 1987-04-20 | 1995-09-28 | Mitsubishi Motors Corp | Hydraulic control method for a hydraulically actuated load |
US4964050A (en) * | 1987-05-12 | 1990-10-16 | Honda Giken Kogyo Kabushiki Kaisha | Method of controlling electrical devices of internal combustion engines |
DE3943357A1 (en) | 1989-12-29 | 1991-07-04 | Rexroth Mannesmann Gmbh | CIRCUIT ARRANGEMENT WITH A CONTROL ELECTRONICS FOR THE MAGNETIC COILS OF ACTUATORS OF A HYDRAULIC SYSTEM |
US5177965A (en) | 1989-12-29 | 1993-01-12 | Heinrich Nikolaus | Pump control system with limit signal generated at a given displacement setting |
DE4138225A1 (en) | 1991-11-21 | 1993-05-27 | Bosch Gmbh Robert | METHOD FOR REGULATING THE MOVEMENT OF A LIFT |
DE9217999U1 (en) | 1992-04-18 | 1993-06-17 | Man Nutzfahrzeuge Ag, 8000 Muenchen, De | |
US6157671A (en) | 1997-11-06 | 2000-12-05 | Caterpillar Inc. | Apparatus and method for digitally monitoring a duty cycle of a pulse width modulated signal |
DE19929431A1 (en) | 1999-06-26 | 2000-12-28 | Mannesmann Sachs Ag | Hydraulic control drive, e.g. for clutches, gearboxes, has arrangement for detecting level of fluid in reservoir container from duration of time for which pump is switched on |
US6856879B2 (en) * | 2003-01-24 | 2005-02-15 | Komatsu Ltd. | Work machine management device |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080171633A1 (en) * | 2005-03-17 | 2008-07-17 | Zf Friedrichshafen Ag | Method And Device For Controlling A Motor Vehicle Drive Train |
US8366588B2 (en) | 2005-03-17 | 2013-02-05 | Zf Friedrichshafen Ag | Method and device for controlling a motor vehicle drive train |
Also Published As
Publication number | Publication date |
---|---|
DE50202814D1 (en) | 2005-05-19 |
BR0214970A (en) | 2004-12-14 |
JP4219815B2 (en) | 2009-02-04 |
EP1454413A1 (en) | 2004-09-08 |
DE10161742A1 (en) | 2003-06-18 |
EP1454413B1 (en) | 2005-04-13 |
KR100959424B1 (en) | 2010-05-25 |
KR20040066904A (en) | 2004-07-27 |
JP2005513638A (en) | 2005-05-12 |
US20050033552A1 (en) | 2005-02-10 |
WO2003052931A1 (en) | 2003-06-26 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ZF FRIEDRICHSHAFEN AG, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GANSOHR, MARCUS;EBNER, OTTO;SCHWEIGER, KLAUS;AND OTHERS;REEL/FRAME:015826/0497;SIGNING DATES FROM 20040420 TO 20040514 |
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Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
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FPAY | Fee payment |
Year of fee payment: 4 |
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Year of fee payment: 8 |
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FEPP | Fee payment procedure |
Free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.) |
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LAPS | Lapse for failure to pay maintenance fees |
Free format text: PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP.) |
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STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
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FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20180221 |